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5 Reviews
View Product Reviews40mm Celotex TB4040 PIR Insulation Board 2400mm x 1200mm
| 20+ boards | 40+ boards | 50+ boards |
| £16.30ex. VAT | £16.13ex. VAT | £15.97ex. VAT |
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Nationwide Delivery
Wed 9 Jul
- 2days
- 10hrs
- 29mins
- 51secs
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- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/en-GB
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
Product Overview
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Delivery & Returns Information
All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, CF, DD, DG, KW, IV, LD, LL, NP, PH, SA and SY. If your delivery address is in any of these postcode areas a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £150 | £50 ex. VAT |
| Between £150 - £400 ex. VAT | £35 ex. VAT |
| Over £400 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £20 ex. VAT |
| Between £100 - £250 ex. VAT | £15 ex. VAT |
| Over £250 ex. VAT | FREE |
| SuperFOIL and YBS products | |
| ORDER VALUE | DELIVERY CHARGE |
| Each item | £10 ex. VAT |
| Over £350 ex. VAT of 1 brand | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £7.50 ex. VAT |
| Over £100 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{home}} Use in floors, framed walls and pitched roofs
- {{grade}} Aluminium composite facing on both sides
- {{thermostat}} 0.022 W/mK thermal conductivity
- {{build}} Easy to handle and install
- {{public}} Zero Ozone Depletion Potential (ODP)
- {{verified_user}} BBA certified
Technical Specification
| Material Type: | PIR |
|---|---|
| Thickness: | 40mm |
| Width: | 1200mm |
| Length: | 2400mm |
| Sales Unit: | Board |
| Sales Unit Coverage: | 2.88m2 |
| Brand: | Celotex |
| Manufacturer's Reference: | TB4040 |
| Weight: | 4.06kg |
| Thermal Conductivity: | 0.022W/mK |
Technical Downloads
About 40mm Celotex
- TB4040 is a high-performance PIR insulation board designed to combat thermal bridging (TB) in walls, roofs, and floors.
- BBA-certified for reliability and compliance with UK Building Regulations.
- Ideal for both new-build and retrofit projects where minimising heat loss is essential.
- Delivers excellent thermal efficiency with a low thermal conductivity of 0.022 W/m·K.
- Low-emissivity foil-facing enhances performance by reflecting radiant heat within cavity air spaces.
- Lightweight yet rigid design simplifies handling, cutting, and installation.
- Manufactured with sustainability in mind, offering Zero Global Warming Potential (GWP) and Zero Ozone Depleting Potential (ODP).
Applications
Roofs
- Pitched Roof Insulation: Below Timber Rafters, Above Timber Rafters
Walls
- External Wall Insulation: Timber Frame Internal Linings, Masonry Cavity Internal Linings, Solid Masonry Internal Linings
- Partition Walls
Floors
- Ground Floor Insulation: Beam & Block (Perimeter Upstand), Concrete Slab (Perimeter Upstand), Suspended Timber Joists (Perimeter Upstand), Upgrading Existing Concrete Slab (Perimeter Upstand)
Benefits
- Excellent Thermal Performance - 0.022 W/m·K thermal conductivity reduces insulation thickness required to meet U-values.
- Moisture Resistant - Prevents water absorption, maintaining thermal efficiency.
- Environmentally Responsible - Zero GWP and ODP, supporting sustainable construction.
- Cost-Effective - Provides high performance at a competitive price.
- Non-Toxic - Safe to handle and install, with no harmful emissions.
- Low-Emissivity Foil Facings - Improves thermal insulation within cavity air spaces.
Certifications
- Spread of Flame: Euroclass E Reaction to Fire classification (BS EN 13501-1).
- Thermal Conductivity: 0.022 W/m·K (BS EN 12667).
- Compressive Strength: ≥140kPa (BS EN 826).
- BRE Green Guide Rating of A - Supports BREEAM sustainability assessments.
- BBA Certified - Independently assessed for performance and compliance.
Customer Reviews
good
great for insulating
kept the house warm
great insulation
This insulation was used to address thermal bridging I had through some beams in our roof. Great to reduce localised heat losses in our loft. Also very competitive price!
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